Houston police said in all of the attacks, the armed suspect forced his victims at gunpoint into a vacant apartment where he sexually assaulted them. He fired a weapon into the air in one of the cases, officials said. A second suspect was present in at least two of the assaults, but police said he did not participate in the assaults.

Police said both suspects were described only as black males. One is 17 to 21 years of age, about 5 feet 5 inches tall, with a small, but slightly muscular build. He was believed to be armed with a revolver. The other suspect is in his 20s, about 6 feet tall, with a medium to thick build.